教学是一次重要的历程,于师、于生均是如此。当教学历程变为一种旅程,而且是一种通透的旅程,其体验是不言而喻的,关于数学知识、能力、感悟和思考等也必将水到渠成。问题的关键是:如何通透?本文试就一道习题教学的前后相关研究,阐述对数学教学的理解、重建、设想和实施,最后给出两点反思。 Teaching is an important course, both in teachers and students. When the teaching course becomes a kind of journey, and it is a kind of transparent journey, the experience is self-evident. So far as mathematics knowledge, ability, perception and thinking are concerned, it will also come to an incident. The crux of the question is: How to be transparent? This article tries to make a study of the related problems before and after exercise teaching, elaborates understanding, reconstruction, design and implementation of mathematics teaching, and finally gives two reflections.